
\begingroup
\centering
\begin{tabular}{m{6cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm} m{1.4cm}}
   \toprule
                                         & (1)            & (2)            & (3)     & (4)            & (5)            & (6)\\  
   $\textbf{Panel A: ammonia}$\\
                                         &                &                &         &                &                &  \\  
   IHS restored wetland (acres)          & -0.006$^{***}$ & -0.009$^{***}$ & -0.002  & -0.005$^{***}$ & -0.008$^{***}$ & -0.002$^{*}$\\   
                                         & (0.001)        & (0.002)        & (0.001) & (0.002)        & (0.002)        & (0.001)\\   
   IHS upstream restored wetland (acres) &                &                &         & -0.007$^{***}$ & -0.005$^{***}$ & -0.003$^{**}$\\   
                                         &                &                &         & (0.002)        & (0.002)        & (0.002)\\   
    \\
   Dependent variable mean               & 0.11793        & 0.11793        & 0.11793 & 0.11675        & 0.11675        & 0.11675\\  
   Observations                          & 14,257         & 14,257         & 14,257  & 12,466         & 12,466         & 12,466\\  
   Adjusted R$^2$                        & 0.28355        & 0.43748        & 0.41381 & 0.31307        & 0.46539        & 0.44217\\  
                                         &                &                &         &                &                &  \\  
\end{tabular}
\par\endgroup


